Vabiable motion mechanism foe sole leveling oe othee machines



(No Model.) 3 Sheets-Sheet l. E. C. JUDD & F. W. GOY VARIABLE MOTION MECHANISM FOR SOLE LEVELING OR OTHER MAGHINES.

Patented Aug. 27, 1895.

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w SEES:

(No Model.) 3 Sh.eetsSheet 2.

E O. JUDD & F. W. OOY. VARIABLE MOTION MECHANISM FOR SOLE LEVELING OR OTHER MAGHINBS.

No. 545,407. Patented Aug. 27, 1895.

Ally

3 Sheets-Sheet 3.

(No Model.)

B. G. JUDD & 1?. W. GUY. VARIABLE MOTION MECHANISM P93 SOLE LEVELING'OR OTHER MAGHINES.

Patented Aug. 27, 1895.

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UNITED STATES rrrc PATENT EDlVARD C. JUDD AND FREDERICK 1V. COY, OF BOSTON, MASSACHUSETTS; SAID COY ASSIGNOR TO SAID JUDD.

VARIABLE-MOTION MECHANISM FOR SOLE-LEVELING OR OTHER MACHINES.

SPECIFICATION forming part of Letters Patent No. 545,407, dated August 27, 1895.

Application filed April 4, 1895. Serial No. 544,479. (No model.)

To all whom it 'lll/[by concern:

Be it known that we, EDVV'ARD C. JUDD and FREDERICK W. COY, citizens of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Variable-Motion Mechanism for Sole-Leveling and other Machines, of which the following is a specification.

to This invention relates to power-driven mechanism for imparting an oscillatory or reciprocatory motion to a mechanical device through the medium of connections with a rotary power-shat t.

The chief object of our present invention is to provide new and improved means for changing or varying the extent of travel or the V stroke of the oscillatory or reciprocatory device or member without stopping or interfer- 2o ing with the rotation of the power-shaft,

whereby an attendant or workman can,without leaving or moving from his proper position in performing the work in hand, cause the extent of travel or the stroke of the cs- 2 5 cillatory or rcciprocatory device or member to change or vary according to the conditions required in operating on different kinds of work or upon objects which vary in dimensions or size.

The invention is particularly designed for machines adapted to level the soles of boots and shoes by the movement of a jack under a sole-leveling roll or rolls; but the invention is useful in machines for molding the soles of 5 boots and shoes, shaping and finishing metal work, and generally in machines wherein it is desirable to change or vary the extent of motion or travel or the stroke of oscillatory or reciprocatory devices or membersas, for ex- 0 ample, the jack on which a'shoe is mountedor the sole'leveling roll or rolls which reciprocate or vibrate over the jack.

To accomplish the object above stated, the invention involves the features of construc- 5 tion, the arrangement or combination of devices, and the principles of operation hereinafter described, and pointed out in the claims, reference being made to the accompanying drawings, in which- Figure 1 is a side elevation of sulficient of a machine to illustrate our invention. Fig.

2 is a rear end elevation of the same, omitting the leveling-roll and the shoejack, which are represented in Fig. 1. Fig. 3 is atop plan view of the same, omitting the reciprocating or vibrating leveling-roll and the shoe-jack, which are represented in Fig. 1. Fig. 4 is a horizontal sectional view taken on the line 4 4, Fig.1, omitting the shoe-jack and the devices forreciprocating or vibrating the leveling-roll, which are represented in Fig. 1.

Fig. 5 is a side elevation showing a modification of our invention. Fig. 6 is a top plan view of the same. Figs. 7 and 8 are diagrams hereinafter explained. Fig. 9 is a sectional perspective view of a portion of the machine to more clearly illustrate some of the operative parts. Fig. 10 is a detail view of the hand-lever and the inclined plate of the rockshaft to more clearly show the action of the hand-lever and the inclined plate, and Fig. 11 is a diagram of a modification hereinafter explained.

The present invention is particularly designed for those machines wherein the travel of an oscillatory or reciprocatory device or member is changed or varied with greater or less frequency to adapt the oscillatory or reciprocatory device or member to the particular work in handas, for example, where dif- 8o ferent objects or work to be operated upon differ in dimensions or size, as in a shaper for finishing metal work and in a soleleveling machine where it is desirable or necessary to frequently change the travel of a shoejack 8 to operate on shoes which difier or vary in S126.

The numeral 1 indicates the main frame 01 a machine having an oscillatory or reciprocatory device or member, which, in the pres- 9o ent example of our invention, is composed of a rockingshaft 2, journaled in bearings 3 on the main frame, and having at one end a crank-arm 4, provided with an index or pointer 5, adapted to move or travel over or in jux- 5 taposition to a segmental or other suitable graduated or scale plate 5, suitably supported on the main frame of the machine.

The crank-arm Ms pivotally connected, as at 7, with one end ofa link or pitman 8, which, rco at its other end, has a crank connection with a power-transmitting shaft 9, journaled in t belted to a motor or engine of any desired bearings on the main frame,and. designed to be rotated by any suitable power-such, for example, as a belt-pulley 12 adapted to be type. t

- The crank connection between the link or pitman S and theprimary power-shaft 9 is composed of a disk or wheel 13, having par- I 16, with which one end of the link or pitman 8 is connected in such manner that when the primary power-shaft is rotated the link or pitman S is movedback and fortli,the crankarm at is swung like a pendulum, andthe'dedevice or member 2.

e link or pitmanJSand the primary power-shaft vice or member 2 is oscillated or recipro-:

catcd. c

Theindex or pointer 5 and graduated plate 6 indicate the extent of motion or travel or the stroke of the oscillatory or reciprocatory In order to, vary the extent of motion or travel or the stroke of the oscillatory or reciprocatory device or member 2, the crank connection between the i 9 is, rendered adjustable relatively. to the geometrical axis of the shaft, sothat, according to the positionof the crank connection with relation to the center of the shaft, the extent .of motion or travel or the stroke ofthe 0s cillatory or reciprocatory device or member isaincreased or diminishedto suit the conditions required in operating upon different kinds of work or upon objects which differ or vary in dimensions or size.

It is very desirable to enable the extent of motion or travel of the device or member 2 to be changed or varied at the will of the operator or workman without stopping the motion of the power-shaft, and without the necessity of the operator or workman moving from his proper position in inspecting and controlling the work in hand; and to accomplish this object we adjust the crank connection through the medium of devices operated by motion of the rotary shaft, as will now be explained in detail.

The slidable plate is provided with a pin 17, extending througha radial slot 18 in the disk or wheel 13 and engaging a cam mounted on the shaft 9 and composed of a disk or wheel 19, having a cam-groove 20 into which the pin 17 projects. The hub of the disk or wheel 19 is provided at one side with a clutchsection 21, and at the opposite side with a clutch-section 22, in such manner that if the disk or wheel 19 is shifted 'in one direction, the clutch-section 21 will engage a clutchsection 23 on the inner face of the disk or wheel 13, while if the disk or wheel 19 is shifted in the opposite direction, the clutchsection 22 will engage a clutch-section 24 on the main frame of the machine. The inner endof the hub of the disk or wheel 19 is pro- The vided with a circular groove, in which is arrangeda collar 25, having oppositely project 'ingpins26 entering eyes in arms 27, which are rigidly secured to a longitudinal rock' shaft 28. The rock-shaft is journaled in bear ings 29 on the main frame, and thefront end of the rock-shaft is provided with an inclined or diagonally-arranged plate 30, engaging'a'u inclined guide 31 on 'a' hand-lever 32, which is pivoted, as at 32*, to theinain frame of the machine, sot'nat aswinging motion of the hand-lever causes the inclined guide 31 to so act on the inclined plate as to rock the shaft 28 inone or the otherdirectiou, thereby shifting thev disk or wheel'19 on the power shaft 9. If thehand-lever 32 is shifted toward the front end, of the machine orinthe' directionof the arrow-Fig. 1, the rock-shaft 28-will be turned in the direction to cause the clutch-section 22 to engagethe clutch-sec tion 24: on the main frame. By this means the diskor Wheel19 will be locked stationary, but the shaft 9 and disk or wheel 13 will continue to rotate, and consequently the pin 17,

traversing the earn-groove 20, will cause the plate 15 to slide and adjust the crank or wrist pin 16 relativelyto the geometrical axis :of the powei shaft. ,If' the hand-lever 32- is shifted toward the rear end of the machine] or in the direction opposed to the direction of the arrow, Fig, 1, the disk or wheel 13 will be shifted outwardly on the power-shaft 9, and aclutch-section 21 will be engaged with the clutch-section 23 ofthe disk or wheel13, thereby causing the two disks 'or wheels 13- and 19 to be locked together and to rotate in unison with the power-shaft.

The hand-lever 32 is provided at a point above the inclined or diagonal plate 30 with a longitudinal slot 33, into which projects a pin 34: extending from a sliding bar or rod 35. The rear end of the bar or rod 35 is constructed to engage and disengage a lever 36, pivoted intermediate its extremities, as at 37. The means for connecting and disconnecting the bar or rod 35 and the lever 36 consists of a hook 38 on the rear end of the bar or rod 35, and a hook 39 on the front end of the le ver 36. The hook of the lever 36 is normally held in engagement with the hook of the bar or rod 35 by a spring 40. The lever 36 is automatically disengaged from the bar or rod 35 at recurring intervals through the medium of tappets or inclined lugs 41 and 42, secured to and projecting from the inner face of the disk or wheel 19. The tappets or inclined lugs are so placed that when the disk or wheel 19 rotates they will strike a pin 43 projecting from the rear end of the lever 36, and shift this lever so that its hooked end 39 is disengaged from the hooked end of the bar or rod 35. When this occurs, the lever 32 can be shifted for the purpose of adjusting the position of the crank connection relatively to the axis of the primary power-shaft and thereby changing the extent of motion or travel or the stroke of the oscillatory or reciprocatory device or member 2.

The sliding bar or rod 35 is guided in a suitable bearing 4%, secured to the main frame of the machine.

The crank or wrist pin 16 is offset sufficiently far from the pin 17 that when the latter is at a point in the cam-groove nearest the center of motion or rather nearest the axis of the primary power'shaft 9, the crank or wrist pin 16 is directly at the center of motion or coincident with the axis of the primary power-shaft. In consequence of this if the disk or wheel 19 is engaged with the disk or wheel 13, through the medium of the clutch-sections 21 and 23, no motion of the crank-arm 13 can take place, although the primary power-shaft continues to rotate. If the disks or wheels 13 and 19 are engaged while the pin 17 is at any other part of the cam-groove, a corresponding length of travel or throw of the crank or wrist pin 16 occurs, and through the connections hereinbefore explained the movement of the oscillatory or reciprocatory device or member 2 will be governed, and the length of this motion or throw will be indicated by the pointer or index 5 and graduated plate 6.

lVhen it is desired to change the extent of motion or travel or the stroke of the oscillatory or reciprocatory device or member 2, the hand-lever 32 is shifted in the direction of the arrow, Fig 1, at the time that one of the tappets or inclined lugs 41 and 42 strikes the pin 43 and disengages the hook 39 of the lever 36 from the hook 38 of the sliding bar or rod 35. As the hand-lever 32 is shifted forward, as described, the inclined plate 30 is moved laterally and the shaft 28 is rocked in its bearings in the direction required to adjust the disks or wheels 13 and 19, and moves the clutch-section 22 of the disk or wheel 19 into engagement with the clutch-section 24: on

the main frame. The disk or wheel 19 will then be held stationary, but the shaft 9 and disk .or wheel 13 will continue to rotate, so that the pin 17 traverses the cam-groove and changes the distance of the crank or wrist pin relatively to the center of motion or the geometrical axis of the primary power-shaft. \Vhen the required amount of motion or travel of the oscillatory or reciprocatory device or member 2 is secured, which is determined by watching the pointer 5, the handlever 32 is shifted rearward, and the disks or wheels 13 and 19 are engaged, so that the length of motion or travel of the oscillatory or reciprocatory device or member 2 is fixed until it is again necessary to change the extent of motion or travel of said device or member. This mode of operation is diagrammatically illustrated in Figs. '7 and 8, which indicates the change from the extreme motion or extent of travel of the oscillatory or reciprocatory device or member to about one-half the extent of motion or travel of the same.

The oscillatory or reciprocatory device or If a shoe-jack is mounted on the oscillatory orreciprocatory device or member 2, the necessary extent of motion or travel of the jack for enabling the sole-leveling roll or rolls to operate upon long or short shoes can be gov- V erned by the attendant or workman without leaving his position at the front of the machine and without stopping the motion of the primary power-shaft.

If the invention is used in a sole-leveling machine, as in Fig. 1, the soleleveling roll 2" will be reciprocated or vibrated through the medium of any suitable connections with the power-shaft 9. Further description in this connection is deemed unnecessary, as soleleveling machines having reciprocating or vibrating leveling-rolls are well known.

It is proposed to use the link or pitman S for controlling the rectilinearly-reciprocating movement of any device or member which is to be reciprocated in a right line. We have illustrated this feature diagrammatically in Fig. 11, where the numeral 8 indicates the link or pitman, 5 the index or pointer, and 3 the device, member, ortool which is to be reciprocated in a right line. In this diagram, Fig. 11, the other parts which are designated by reference-numerals are the same as corresponding parts shown in Figs. 1 and 2, and hereinbefore described in detail.

In Figs. 1 to 4, inclusive, a plain-faced cam in the form of agroove 20 in a disk or wheel 19 is shown for the purpose of changing the extent of motion or travel, after which this cam is locked in the required position. Obviously various-shaped cams can be used whenever it is desirable to provide an extreme movement varying in speed at different points in the revolution, which would be the result if the cam disk or wheel 19 was thrown'back against the main frame of the machine, and the pin 17, moving in the camgroove 20, would vary in distance from the center of the shaft 9, and have corresponding effect on its connections with the oscillatory or reciprocatory device or member.

In the modifications 5 and 6 the extent of motion or travel of the oscillatory or reciprocatory device or member 2 is effected in the following manner: The main frame is provided with a sleeve 45, the acting face of which is helical. The disk or wheel 16, corresponding to the disk or wheel 13, Figs. 1 to at, inclusive, is mounted on the primary powershai't 9, and is provided on its outer face with parallel guidestrips 47, between which a plate 48 is adapted to slide. The slidable plate 48 is provided with a crank or wrist pin IIC 19, and with an inwardly-projecting arm or lug 50, movable in a radial slot, like radial slot 18 of the disk or Wheel 13. The disk or Wheel is also provided with a fixed arm orlug 51, and to the lugs or arms 50 and 51 are re spectively pivoted toggle-levers 52 and 53, jointed at their adjacent or contiguous ends to a link 54, which is pivotally connected with a collar '55, adapted to turn in a circular groove in a sleeve 56, mounted on the shaft 9. The acting face of the sleeve 56 is helical, and runs in a direction opposed to the helical face of the sleeve 45 on the main frame. The sleeve 56 is provided with an arm 57, which connects by aball-and-socket. joint 58 with one end of a bar or rod 59, the other or front end of which connects by a ball-and-socket joint 60 with a hand-lever 61, pivoted, as at 62, to the main frame of the machine. The hand-lever 61 is provided with a springlatch 63, adapted to co-operate with a notched segment 64 on the main frame. The sleeve 56 is drawn into engagement with the sleeve a5 through the medium of a suitable spring 65, connected atone end with the mainframe and at the other end with the sleeve 56. The crank or Wrist pin 49 connects with a link or pitman 66 for swinging a crank-arm 67 fixed to the oscillatory or reciprocatory device or member 2, as described with reference to Figs. 1 to 4, inclusive.

If the hand-lever 61 is shifted in the direction of the arrow, Fig. 5, the helical sleeve 56 is held in engagement with the helical sleeve 45, through the medium of the spring 65, and the slidable plate 48, which carries the crank or wrist pin 49 is drawn toward the center of motion or the axis of the shaft 9 by the togglelevers 52 and 53 and link 54. By this means any motion or travel of the crank or wrist pin, from a point in which there is no throw whatever to the point of extreme throw, can be governed at the will of the operator by shifting the hand-lever and causing the springlatch to engage the proper notch in the quadrant.

The sleeve 56 is susceptible of sliding along the length of the shaft 9, and is also adapted to rotate on said shaft.

We believe that we are the first to change or vary the extent of motion or travel or the throw of an oscillatory or reciprocatory device or member at the willof the operator without stopping or interfering with the rotation of the power-transmitting shaft, and therefore we do not wish to be understood as confining ourselves to the specific construction and arrangement of devices for accomplishing the result stated, as other arrangements for the same purpose may be employed without affecting the spirit of our invention.

If our invention is applied toa machine for leveling the soles of boots and shoes anditis desired to change or vary the extent of motion or the stroke of the shoe-jack,the operator is not required to interfere with the operation of the machine by stopping the rotation of the main power-shaft,but through the medium of the hand-lever can make any desired change in the extent of travel of thejack from a dead-center to the utmost limit of the travel without in any manner interfering with or large or small shoes.

stopping therotation of the power-shaft. The extent of travel of the jack can be varied almost instantly to accommodate the machine to For instance, a shoe size No. 6 does not require so much travel of the jack as a shoe size No. 8. By means of the dial and pointer any size can he quickly arranged for, and the operator does not require to shift the belt, stop the machine, and pass around behind the same with a wrench and make adjustments necessary to change or vary the extent of travel or the stroke of the jack.

In our present invention it is possible to throw the jack rearward toward the operator with the shoe and last on the jack practically out from under the roll, in which position the jack can be held motionless until the opera" tor performs any work necessary. At the same time the power-shat t continues to rotate, and all or nearly all the other parts of the machine are in operation, and the levelingroll-one or more-is reciprocating or vibrating ready to be brought into contact with the shoe-sole whenever the operator desires.

Having thus described our invention, what we claim is 1. The combination of an oscillatory or reciprocatory device, a driving-shaft, a crank or wrist-pin adjustably connected with the driving-shaft, a cam shiftable along the length of the shaft and in operative connection with the crank or wrist-pin for adjusting the latter relatively to the center of motion, means for shifting and holding the cam stationary in connection with the crank or wrist-pin While the latter and the shaft rotate, and means for shifting the cam and locking it and the crank or wrist-pin together when the desired adjustment of the crank or wrist-pin is effected.

2. The combination of an oscillatory or reciprocatory device, a driving-shaft, a disk or wheel secured to the driving-shaft and having an adjustable crank or wrist-pin, a connection between the oscillatory or reciprocatory device and the crank or wrist-pin, crank or wrist-pin adj usting-devices mounted on the driving-shaft and adapted to be thrown into and out of engagement with the said shaft, a lever, a rod connected with the lever, and a lever detachably connected with the rod and actuated at intervals bya part of the crank or wrist-pin adjusting-devices mounted on the driving, shaft, for severing and establishing the operative connection between the detachably connected rod and lever.

3. The combination of a rotary drivingshaft, a radially adj ustable-crank or wrist-pin connected with the driving-shaft, a cam loosely mounted on the driving-shaft, movable along the length thereof and normally held in engagement with the driving-shaft and with a part of the crank or wrist-pin, devices for shifting the cam on the shaft and locking said cam thereto and in engagement with a part of the crank or wrist-pin, devices for locking the cam stationary in operative connection IOC with the crank or wrist-pin while the latter and the driving-shaft continue to rotate, and lever mechanism for shifting the cam on the driving-shaft from one of said locking devices to the other. i

at. The combination with a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, of a disk or wheel fixed to the shaft and having an adjustable crank or wrist-pin in operative connection with the oscillatory or reciprocatory device or member, a cam movable along the length of the shaft and engaged with a part of the crank or wrist-pin for adjusting the latter relatively to the center of the shaft, a rock-shaft having devices connecting it with the cam for shifting the latter along the length of the rotaryshaft toward and from the disk or wheel which carries the crank or wrist-pin, a lever engaged with a part of the rock-shaft for turning the latter to shift the cam when said lever is actuated, and means for locking, the cam either to the disk or wheel or to a fixed part of the frame.

5. The combination with a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, of a disk or wheel fixed to the shaft and provided with a radially adjustable crank or wrist-pin, a cam shiftable on the shaft and acting upon the crank or wrist-pin to adjust the latter relatively to the center of the shaft, a clutch for connecting and disconnecting the cam and the disk or wheel, a clutch for connecting and disconnecting the cam and a fixed object, a pivoted swinging lever, and connections between the lever and the cam for shifting the latter on the rotary shaft to engage one or the other clutch.

6. The combination of a rotary-shaft carrying a shoe-jack, a leveling-roll under which the shoejack oscillates, travel or strokechanging mechanism in operative connection with the rotary-shaft and actuated whenever required by a moving part of the machine to change or vary the extent of motion or travel of the jack without stopping the operation of the power-transmitting shaft, an index or scale, and a pointer moved by the travel or stroke'changing mechanism over the index or scale to indicate the extent of motion of the oscillatory shaft which carries the shoejack.

7. The combination with a machine having an oscillatory or reciprocatory device or memher, and a rotary-shaft, of a disk or wheel provided with a crank or wrist-pin adjustable relatively to the center of the shaft, a link or pitman connecting the crank or wrist-pin with the oscillatory or reciprocatory device or memher, a cam mounted on the rotary-shaft and acting upon the crank or wrist-pin to shift the latter toward or from the center of the shaft, devices for shifting the cam into engagement with the disk or wheel, devices for shifting the cam out of engagement with the disk or wheel, and devices which hold the cam staor wrist-pin continue to rotate.

8. The combination with a machine having an oscillatoryshaft, and a rotary driving-shaft,

of a crank-arm on the oscillatory shaft-,a disk or Wheel having an adjustable crank or wristpin, a link or pitman connecting said crankarm with the crank or wrist-pin, a cam acting upon the crank or wrist-pin to shift the latter relatively to the center of the shaft, a clutch for connecting and disconnecting the cam and the disk or wheel, a clutch for connecting and disconnecting the cam and a fixed object, and suitable mechanism for shifting the cam on the shaft to engage one or the other clutch.

9. The combination with a machine having an oscillatory shaft provided with a crankarm, and a rotary driving'shaft provided with a disk or wheel having a radially adjustable crank or wrist-pin, of a link or pitman contions between the hand-lever and the cam mechanism for causing the latter to adjust the crank or wrist-pin, an index or scale, and a pointer moved by oscillatory shaft over the index or scale to indicate the extent of motion of said oscillatory shaft.

10. Inamachine having an oscillatory or reciprocatory device or member, a disk, plate, or wheel fixed toa rotary-shaft and provided with a crank or wrist-pi n adjustable relatively to the center of motion and in operative connection with said device or member, a cam for varying the distance of the crank or wristpin with respect to the centerof motion, means for holding the cam stationary whenever desired while the shaft and crank or wrist-pin continue to rotate, and means for locking the cam and the disk, plate or wheel together when the desired adjustment of the crank or wrist-pin is efiected.

11. The combination with a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, of a disk or wheel fixed to the shaft and having an adjustable crank or wrist-pin in operative connect-ion with the oscillatory or reciprocatory device or member, a cam mounted on the shaft for adjusting the crank or wrist-pin relatively to the center of the shaft, a rock-shaft in operative connection with the cam for shifting the latter toward and from the disk or wheel which carries the crank or wrist-pin, and-a lever acting on a part of the rock-shaft for turning the latter to shift the cam.

12. The combinationwith a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, of a disk or wheel fixed to the shaft and provided with an adjustable crank or wrist-pin in operative connection with the oscillatory or reciprocatory device or member, a cam mounted on the shaft IIO and acting on the crank or Wrist-pin to shift the latter relatively to the center of the shaft, 2. rock-shaft connected with the cam for shifting the latter toward and from the disk or wheel, an inclined plate rigid with the rockshaft, and a lever having an inclined guide engaging the inclined plate for turning the rock-shaft when the lever is actuated.

13. The combination with a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, ofa disk or wheel fixed to the shaft and provided with an adjustable crank or wrist-pin, a cam acting upon the crank or Wrist-pin to shift the latter relatively to the center of the shaft, a clutch for connecting and disconnecting the cam and the disk or wheel, a clutch for connecting and disconnecting the cam and a fixed part of the main frame, and suitable mechanism for shifting the cam on the shaft.

14. The combination With a machine having an oscillatory or reciprocatory device or member, and a rotary-shaft, of a disk or wheel fixed to the shaft and provided with an adjustable crank or wrist-pin, a cam acting upon the crank or wrist-pin to shift the latter relatively to the center of the shaft, a clutch for connecting and disconnecting the cam and the disk or Wheel, a clutch for connecting and disconnecting the cam and a fixed part of the main frame, a rock-shaft connected with the cam for shifting the latter on the shaft, and a lever acting upon a part of the rock-shaft to turn the latter when the lever is actuated.

In testimony whereof we have hereunto set our hands and affixed our seals in presence of two subscribing witnesses.

EDWARD o. JUDD. [n s] FREDERICK W. (JOY. [n s] Witnesses:

A. O. HOWARD, H. STORER BARRY. 

